Fixing heating safety protection circuit and image forming apparatus

The fixing heating safety protection circuit, which works in concert with the main and secondary controllers, solves the safety hazards and poor user experience of the image forming device in SoC sleep mode. It realizes safe heating control under unstable input voltage or extreme ambient temperature conditions, thereby improving equipment safety and user experience.

CN116594274BActive Publication Date: 2026-06-12ZHUHAI PANTUM ELECTRONICS CO LTD
View PDF 3 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHUHAI PANTUM ELECTRONICS CO LTD
Filing Date
2023-05-31
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

Existing image forming devices cannot detect abnormalities in the fixing heating circuit in a timely manner during SoC sleep mode, resulting in safety hazards and poor user experience. Furthermore, they cannot adjust the heating strategy in a timely manner when the input voltage is unstable or the ambient temperature is extreme, which may lead to fixing burn-out or fatal errors.

⚗Method used

A fuser heating safety protection circuit is introduced, in which the main controller and the auxiliary controller work together. The auxiliary controller is responsible for abnormal detection when the main controller is in sleep mode or malfunctioning. It identifies heating faults through various methods and controls the fuser heating circuit to stop. The heating strategy is flexibly adjusted according to the input voltage and ambient temperature.

🎯Benefits of technology

It improves the safety and user experience of the image forming apparatus, reduces false alarms and missed alarms of heating failures, and ensures that heating is stopped in time under abnormal conditions to prevent equipment damage.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN116594274B_ABST
    Figure CN116594274B_ABST
Patent Text Reader

Abstract

The embodiment of the present application provides a fixing heating safety protection circuit and an image forming device. The fixing heating safety protection circuit comprises a main controller, a secondary controller and a fixing heating circuit; the secondary controller is used for entering a first abnormality detection mode when receiving a hibernation signal from the main controller; in the first abnormality detection mode, the secondary controller controls the fixing heating circuit to stop heating when recognizing that a heating duration detection signal is a high level, and outputs a first abnormality signal to the main controller; when the main controller is not in a hibernation mode, a second abnormality detection mode is entered; in the second abnormality detection mode, the secondary controller controls the fixing heating circuit to stop heating when recognizing that the heating duration detection signal is a high level and a high level duration is greater than a preset duration, and outputs a second abnormality signal to the main controller. The abnormality detection efficiency is improved, so that the safety of the image forming device is improved, and the use experience of a user is improved.
Need to check novelty before this filing date? Find Prior Art